Re: Looking for help profiling GNUstep programs

[Matt Rice]

--- Andrew Ruder <address@hidden> wrote:

> Richard Frith-Macdonald wrote:
> > Am I doing something stupid?
> > Does anyone have experience with profiling share
> objc libraries (I'm 
> > working on debian unstable intel).
> 
> I've had a good deal of luck with oprofile (which
> requires a kernel 
> component) for debugging gnustep.  With a 2.6.12
> kernel, a kernel patch 
> is not required even for the callgraph support. 
> Simply compile with 
> debug symbols, start the oprofile daemon, run your
> program (in fact, you 
> can even start oprofile daemon while the program is
> running, i believe, 
> if you want to just profile a certain section). 
> Oprofile can even 
> output gprof compatible output.
> 
> The other choice is valgrind with the callgrind
> tool.  I had to get 
> callgrind from their website and compile against my
> own valgrind due to 
> having some issues with the debian package for
> callgrind being much too 
> old.  Running your program under callgrind should
> not affect the actual 
> profiling results, but your program will run
> insanely slowly as with any 
> valgrind utility.
> 
> I've had a lot of luck with both, and oprofile is
> amazingly easy and 
> simple to use and hardly affects the speed at which
> your program runs. 
> I tried to use profile=yes a few weeks ago and ran
> into a lot of issues 
> and finally gave up...
> 
> Cachegrind:
>
http://kcachegrind.sourceforge.net/cgi-bin/show.cgi/KcacheGrindIndex
> 
> Oprofile: (Although debian + 2.6.12 kernel has all
> the components to 
> fully utilize oprofile, iirc)
> http://oprofile.sourceforge.net/news/
> 
> Hope that helps,
> Andy

fwiw thought i'd throw this in for anyone who had
tried oprofile before version 0.8.1 was unable to get
any symbols from ObjC this was fixed
 



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